HIOKI MR8741 ENG (PDF)

MEMORY HiCORDER MR8740, MR8741
Recorders

Fully Integrate into High-Speed,
Multi-channel Measurement Systems
Multi-channel

DVM UNIT MR8990

Up to 32 + 22 channels (MR8740)

Digital Voltage Meter

The MR8740 uses a two-block internal architecture, essentially
giving it the capabilities of two MEMORY HiCORDERs.

Up to 16 channels (MR8741)

Measure minute changes in voltage at a high level of precision. Simultaneous measurement of all channels--rather than
scanner-type measurement--dramatically reduces cycle
times.

High-speed isolated measurement

Systems Integration

20 MS/s isolated sampling

Ideal for rack-mounting

Simultaneous 20M sampling within the same block

Height of 4U (180 mm) or less
MR8740: 177 (H) × 426 (W) mm
MR8741: 160 (H) × 350 (W) mm

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Are you having problems with multi-channel measurement or testing?
“We're using multiple DMM units with
a scanner to switch inputs. Measurement
takes too long…”
Reduced cycle times

“We can't embed our oscilloscope, so we
use it on a shelf. Our setup would be a lot
sleeker if we could fit it in.”

“We need to perform many different types
of measurements on a large number of
channels.”
Measure across multiple channels
at the same time

“Tall, large racks are dangerous in a production setting. I wonder if our setup can
be made smaller…”

“We're using multiple measuring instruments, and it's hard to control them all.
The wiring is a mess…”
Simplified systems

Rack-mountable design

Space-saving design

“I wish we could make measurements
faster and at a higher level of precision.”
High-speed, high-precision performance

Solve these issues with the MR8740/MR8741 Memory HiCorder.
A single-instrument solution for measuring multiple signal types and channels featuring
rack-style measurement units that can be selected freely according to the target application

Solution: The MR8990 DVM Unit
The MR8990 can measure even minute voltages previously measured
with a DMM. Thanks to a 0.1 μV resolution and precision of ±0.01%
rdg. ±0.0025% f.s., the MR8990 can capture minute voltage fluctuations as waveforms.
By switching from a bench-type DMM to a DVM unit, you can cut down
on the amount of space taken up by measuring instruments. With no need
to control multiple instruments, you can also simplify your system.

Solution: Extensive selection of measurement units
Thanks to a unit-based architecture that can accommodate voltage,
current, temperature, frequency, distortion, and control signal (logic)
measurement units, the MR8740/MR8741 is a single-instrument solution for measuring multiple parameters. As a bonus, the ability to

simultaneously record different signals on multiple channels cuts
down on measurement times.

Solution: Rack-mountable design
The MR8740/MR8741 can be mounted in a rack system for a clean,
uncluttered installation.

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Application
Function testing of ECUs and EV inverter motors
The MR8740/MR8741 can be used to perform a range of waveform measurements of inverter output.

Torque
sensor

Encoder

n Hardware combinations
MR8740
8966
8971
9709
MR8990

MEMORY HiCORDER
ANALOG UNIT
CURENT UNIT
CLAMP SENSOR
DVM UNIT

×1
×17
×2
×3
×8

Battery

Motor

Inverter

The MR8740 simultaneously measures 34 analog voltage
waveform channels, 3 current waveform channels, and 16
DC voltage channels. DC voltage is measured at a high
level of precision with a DVM unit. (The instrument provides functionality for time-difference and statistical calculations for voltage waveforms.)

Load

Torque sensor
• Torque
• Rotation

MR8740

Testing of EV batteries

The MR8740/MR8741 supports high-precision voltage measurement with advanced functionality.
n Hardware combinations
MR8740 MEMORY HiCORDER ×1
× As needed
MR8990 DVM UNIT

The recorders can take voltage measurement of battery
cells, a task that requires a high level of precision and
advanced functionality, at 24-bit resolution and
precision of ±0.01% rdg. ±0.0025% f.s.
Since measurement units have a high input resistance, the effect on the measurement target can be reduced.

BA
TT

ER
Y
l Battery evaluation

(Example measurement of control
signal and charge/discharge time)

Testing of power equipment
The MR8740/MR8741 can be embedded in systems used to test equipment.
n Hardware combinations
MR8740 MEMORY HiCORDER ×1
ANALOG UNIT
×17
8966
8973
LOGIC UNIT
×6

The MR8740/MR8741 can perform characteristics testing
of power equipment (load rejection tests and switch tests),
measuring 42 channels of three-phase voltage and current
or sensor output and 112 channels of switch on/off input.

l Timed, multi-channel measurement with a logic unit
The MR8740/MR8741 ships standard with 16 channels of logic
input*1. You can add up to three*2 8973 Logic Units (16 channels
each), making the instruments ideal for timed measurement of
multiple channels.
*1 The MR8740 ships standard with 8 channels each in blocks I and II.
*2 The MR8740 can accommodate up to three measurement units in each block.

l Load rejection testing

Analyze correlation among factors such as the generator voltage
before and after rejection, the rate of frequency variability, the status
of governor servo operation, and voltage regulator switching timing.

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The MR8740 is a rack-mountable instrument that can measure up to (32 + 22) channels. It uses a twoblock architecture (32ch + 22ch), essentially giving it the capabilities of two Memory HiCorders.

MR8740 32ch + 22ch model

Accommodates up to 27 measurement units.
Two-block architecture
(Block I: 16 units; block II: 11 units)
Standard support for 16 logic channels

Support for multi-channel measurement of up to 54 channels

Independent block operation

Switchable inter-block trigger synchronization

Support for applications using different functions

LOGIC Input terminal

16 slots

Block I

11 slots

Block II

Block I
8 ch

Block I : Analog 32ch, Logic 8ch
Block II : Analog 22ch, Logic 8ch
(There may be a lag of up to 1 μs or 3 samples between blocks I and II.)

Block II
8 ch

Since blocks I (32 channels) and II (22 channels) perform measurements independently, it is possible to set different function
and sampling speeds for each block. Operations such as starting
measurement are performed separately by each block, and different
measurement data files are used by each block.
For example...
Block I : MEMORY function, 20MS/s
Block II : FFT function, 20MS/s
A single instrument supports a variety of measurements, expanding the range of applications in which the device can be used.

Ideal for rack-mounting
The MR8740/MR8741 ship standard
with EIA standard-compliant rackmounting hardware.
The instruments also support JIS
standard racks. Please contact HIOKI
for more information.

[Rear] LAN (100BASE-TX) and USB (type A, for USB flash memory or a
mouse) connectors are standard on the rear of the instrument. The power inlet
and power switch are also located here.

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The MR8741 is a bench-top instrument that delivers affordable measurement performance.
It features area judgment functionality and external control terminals.

MR8741 16ch model

Accommodates up to 8 measurement units.
Standard support for 16 logic channels
Area judgment function and external control terminals

[Front panel]

External control terminals

LOGIC terminais

[Rear] A vent (fan), power inlet, and power switch are
located on the rear of the instrument.

DVI-D
Connector
100BASE-TX
Connector

USB Connector
(Type A, for USB memory stick or mouse)

Use as a multi-channel WAVE COMPARATOR.
High-speed waveform judgment function

Judgment area

The MR8741’s waveform judgment function, which monitors whether a target
waveform has diverged from an area with a safe margin, makes it easy to measure
signal waveforms for which it can otherwise be difficult to make pass/fail judgments. The instrument can measure waveforms on multiple channels at the high
speed of 20 MS/s, providing immediate pass/fail judgments in maintenance and
production line applications.
When using a time-axis range slower than 100msec/div, measured waveforms
can be compared in near real-time, enabling you to detect failures on the spot.
Production can be halted in time to minimize resource waste.

Measured waveform

Compare captured waveform with reference area

Setting the waveform evaluation

[OUT] Return NG if any part of the waveform leaves the evaluation area.
[ALL OUT] Return NG if the entire waveform leaves the evaluation area.

Setting the
GO/NG stop mode

[GO] Stop recording on GO result.
[NG] Stop recording on NG result.
[GO] Stop recording on GO or NG result.

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Unit-based architecture accommodates a variety of measurement applications.
High precision and high resolution

DVM UNIT MR8990
DIGITAL VOLTAGE METER

New unit designed exclusively for the MR8740/MR8741

The MR8990 DVM UNIT is a two-channel DC voltage measurement unit designed exclusively for use with the MR8740/MR8741. It
can measure minute fluctuations in output from sensors in automobiles and other equipment and voltage fluctuations in devices such as
batteries at high levels of precision and resolution.
Input Unit Comparison Chart (Sampling Period and Accuracy)

Features
High resolution: 24bit, 6.5-digit display

Thanks to a resolution of 0.1μV, the MR8990 can measure even minute
fluctuations in the output voltage of sensors and other equipment.

High accuracy: ±0.01% rdg. ±0.0025 % f.s.

The MR8990 performs measurements at a high precision of ±0.01% rdg.
±0.0025% f.s. and at speeds of up to 500 samples per second.

Max. allowable input: DC 500 V

The MR8990 can accommodate input ranging from minute to high voltages.

High input resistance

5mV/DIV to 500mV/DIV range: 100 MΩ or greater
: 10 MΩ ±5%
5V/DIV to 50V/DIV range

Specifications

Product guaranteed for one year
Accuracy guaranteed for one year

l Measurement range
Measurement range

Effective input
range(*)

Measurement
resolution
0.1 μV

5 mV/div

(f.s. = 100 mV)

-120 mV to 120 mV

50 mV/div

(f.s. = 1000 mV)

-1200 mV to 1200 mV

1 μV

-12 V to 12 V

10 μV

500 mV/div (f.s. = 10 V)
5 V/div

(f.s. = 100 V)

-120 V to 120 V

100 μV

50 V/div

(f.s. = 1000 V)

-500 V to 500 V

1 mV

Measurement range
(f.s. = 100 mV)

50 mV/div

(f.s. = 1000 mV)

500 mV/div (f.s. = 10 V)
5 V/div

(f.s. = 100 V)

50 V/div

(f.s. = 1000 V)

l Integration time

Power supply frequency

Input
resistance

The MR8990 delivers high precision
and high resolution.

More than

l Resolution: 0.1μV
l Max. allowable input: DC500V
l Accuracy: ±0.01% rdg. ±0.0025% f.s.

100 MΩ
10 MΩ ±5%

*Measurement guaranteed accuracy range

l Measurement accuracy
5 mV/div

Input Unit Comparison Chart (Input Voltage and Sampling Speed)

NPLC: Less than 1

NPLC: More than 1

±0.01% rdg. ±0.015% f.s.

±0.01% rdg. ±0.01% f.s.

±0.01% rdg. ±0.0025% f.s.
±0.025% rdg. ±0.0025% f.s.

Integration time

50 Hz

20 ms × NPLC

60 Hz

16.67 ms × NPLC

NPLC: Settable from 0.1 to 0.9 (in increments of 0.1), 1 to 9 (in increments of 1), and 10 to 100 (in increments of 10).
The number of power line cycles (NPLC), representing the number of cycles in the power supply (50 Hz or 60 Hz) period, determines the integration
time. Larger NPLC values result in more effective rejection of noise caused by the power supply at the expense of lower sampling speeds.

l Temperature characteristics: ± (0.002% rdg. ±0.00025% f.s.) / °C
l A/D conversion
: ΔΣ modulation method 24bit
measurement method
: DC V
l Measurement functions
: 2ch
l Number of channels
: 2 ms (500 sampling/sec)
l Maximum sampling rate
: DC 500 V
l Max. allowable input
l Max. rated voltage to earth : AC, DC 300 V

Option for MR8990
TEST LEAD L2200
One set (Red×1, Black×1) , 70cm (2.30ft) length
Unit jack: Banana terminal
The tip can be replaced with a pin lead or alligator clip.
Max. allowable input: CAT IV 600V, CAT III 1000V

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Choose from nine input units according to your measurement application.
The MR8740/MR8741 uses the same measurement units as the MR8847 MEMORY HiCORDER.

12-bit, 20 MS/s
High-speed sampling

16-bit, 1 MS/s
High resolution

RMS measurement

Distortion
measurement

ANALOG UNIT 8966

HIGH RESOLUTION UNIT 8968

DC/RMS UNIT 8972

STRAIN UNIT 8969

Voltage measurement
Voltage measurement
Voltage measurement (DC/RMS selectable)
Distortion measurement
2ch
2ch
2ch
2ch
Isolated BNC connector
Weidmuller SL 3.5/7/90G
Isolated BNC connector
Isolated BNC connector
Input connectors
(input impedance 1 MΩ, input capacitance 30 pF), (input impedance 1 MΩ, input capacitance 30 pF), (input impedance 1 MΩ, input capacitance 30 pF), (via Conversion Cable 9769, TAJIMI PRC03-12A10-7M10.5)
Max. rated voltage to earth(*): 300 V AC, DC
Max. rated voltage to earth(*): 300 V AC, DC
Max. rated voltage to earth(*): 300 V AC, DC
Max. rated voltage to earth(*): 33 Vrms, or 70V DC
Measurement range
5 mV to 20 V/div, 12 ranges
5 mV to 20 V/div, 12 ranges
5 mV to 20 V/div, 12 ranges
20 με to 1000 με/div, 6 ranges
1/100 of measurement range
1/1600 of measurement range
1/100 of measurement range
1/1250 of measurement range
Measurement
resolution
using 12-bit A/D conversion
using 16-bit A/D conversion
using 12-bit A/D conversion
using 16-bit A/D conversion
Highest sampling rate
20 MS/s
1 MS/s
1 MS/s
200 kS/s
±0.5
%
f.s.
Measurement
±0.5 % f.s.
±0.3 % f.s.
±0.5 % f.s.
RMS amplitude accuracy: ±1 % f.s.
accuracy
Measurement functions
Number of channels

(DC, 30 Hz to 1 kHz)

Frequency
characteristics
Input coupling
Max. allowable input

DC to 5MHz (-3dB)
DC to 100 kHz (-3dB)
DC to 400 kHz (-3dB)
DC to 20 kHz+1 (-3dB)
(with AC coupling: 7 Hz to 5 MHz -3dB) (with AC coupling: 7 Hz to 100 kHz -3dB) (with AC coupling: 7 Hz to 400 kHz -3dB)
AC/DC/GND
AC/DC/GND
AC/DC/GND
DC 400V
DC 400V
DC 400V
( ) with input isolated from the unit, the maximum voltage that can be applied between input channel and chassis and between input channels without damage
*

Temperature measurement
using a thermocouple

Frequency • Rotation

TEMP UNIT 8967

FREQ UNIT 8970

CURRENT UNIT 8971

Measurement functions

Temperature measurement with
thermocouple

Frequency measurement using voltage input

Current measurement using an optional sensor

Number of channels

2ch

2ch

2ch

1/1000 of measurement range
using 16-bit A/D conversion

1/2000 of measurement range
using 16-bit A/D conversion

Measurement
resolution

Specifications

(Integration mode)
Input connectors: Isolated BNC connector (input
Input connectors:
impedance 1 MΩ, input capacitance 30 pF)
Thermocouple input: plug-in connector,
Recommended wire diameter: single-wire, 0.14 to 1.5 Max. rated voltage to earth(*): 300 V AC, DC
mm2, braided wire 0.14 to 1.0 mm2 (conductor wire
diameter min. 0.18 mm), AWG 26 to 16
Frequency measurement range:
Input impedance: Min. 5 MΩ
Between DC to 100kHz (Min. pulse width 2μs), 1Hz/
( )
div to 5kHz/div (full scale= 20 div), 8 settings
Max. rated voltage to earth * : 300 V AC, DC
Accuracy: ±0.1% f.s. (exclude 5kHz/div), ±0.7% f.s. (at
Temperature measurement range:
10°C/div (-100 5kHz/div)
°C to 200°C)
Rotation measurement range:
50°C/div (-200 °C to 1000 °C)
Between 0 to 2 million rotations/minute
100°C/div (-200 °C to 2000°C)
(Min. pulse width 2μs), 100 (r/min)/div to 100k (r/
min)/div (full scale= 20 div), 7 settings
Thermocouple range:
Accuracy: ±0.1% f.s. (excluding 100k (r/min)/div),
K: -200 to 1350 °C J: -200 to 1100 °C
±0.7% f.s. (at 100k (r/min)/div)
E: -200 to 800 °C T: -200 to 400 °C
N: -200 to 1300 °C R: 0 to 1700 °C
Power frequency measurement range:
S: 0 to 1700 °C B: 400 to 1800 °C
50Hz (40 to 60Hz), 60Hz (50 to 70Hz), 400Hz (390 to
W (WRe5-26): 0 to 2000 °C
Reference junction compensation: internal/ external 410Hz) (full scale= 20 div), 3 settings
Accuracy: ±0.03Hz (exclude 400Hz range), ±0.1Hz
(switchable),
(400Hz range)
Line fault detection ON/OFF possible
Measurement accuracy:
Thermocouple K, J, E, T, N: ±0.1 % f.s. ±1 °C
(±0.1 % f.s. ±2 °C at -200 °C to 0 °C),
Thermocouple R, S, W: ±0.1 % f.s. ±3.5 °C
(at 0 °C to 400 °C or less), ±0.1 % f.s. ±3 °C (at 400 °C
or more),
Thermocouple B: ±0.1 % f.s. ±3 °C (at 400 °C or
more)
Reference junction compensation accuracy: ±1.5 °C
(added to measurement accuracy with internal reference junction compensation)

Integration measurement range:
2k counts/div to 1M counts/div, 6 settings
Accuracy: ±range/2000
Duty ratio measurement range:
Between 10Hz to 100kHz (minimum pulse width
2μs), 5%/div (full scale=20 div)
Accuracy: ±1% (10Hz to 10kHz),
±4% (10kHz to 100kHz)
Pulse width measurement range:
Between 2μs to 2sec, 500μs/div to 100ms/dv (full
scale=20 div)
Accuracy: ±0.1% f.s.

*

Clamp sensor direct-coupled
current measurement

1/100 of measurement range
using 12-bit A/D conversion
Input connectors: Sensor connector (input impedance
1 MΩ, exclusive connector for current sensor via
conversion cable the 9318, common ground with
recorder)
Compatible current sensors: CT6865, CT6863, CT
6862, 9709, 9279, 9278, 9277, 9272-10 (To connect the 8971 via conversion cable the 9318)
Measurement range:
Using 9272-10 (20A), 9277: 100mA to 5A/div
(f.s.=20div, 6 settings)
Using CT6862: 200mA to 10A/div (f.s.=20div, 6
settings)
Using 9272-10 (200A), 9278, CT6863: 1A to 50A/
div (f.s.=20div, 6 settings)
Using 9279, 9709: 2A to 100A/div (f.s.=20div, 6
settings)
Accuracy:
Using 9278, 9279: ±0.85% f.s.
Using other sensor: ±0.65% f.s.
RMS amplitude accuracy: ±1% f.s. (DC, 30Hz to
1kHz), ±3% f.s. (1kHz to 10kHz)
RMS response time: 100ms (rise time from 0 to 90%
f.s.), Crest factor: 2 Frequency characteristics: DC to
100kHz, ±3dB (with AC coupling: 7Hz to 100kHz)
Highest sampling rate:
1 MS/s (simultaneous sampling across 2 channels)
8971 Current Unit precautions

• Cannot be used with the MR8741.

• Up to four units can be installed in a

single instrument.

• When using the 9709/CT6865, up to 7

current probes can be used.

Control signal observation
LOGIC UNIT 8973

Logic measurement using an
optional probe
16 channels (up to 4 logic probes can be connected)

Mini-DIN terminal (HIOKI logic probes only)
Compatible logic probes:
n 9320-01/9327

Detection of voltage signal or relay contact signal for High/
Low state recording
Input: 4 channels (common ground between unit and channels), digital/contact input, switchable (contact input can
detect open-collector signals)
Input resistance: 1 MΩ
(with digital input, 0 to +5 V)
500 kΩ or more (with digital input, +5 to +50V)
Pull-up resistance: 2 kΩ
(contact input: internally pulled up to +5 V)Digital input
threshold: 1.4V/ 2.5V/ 4.0V
Contact input detection resistance:
1.4 V: 1.5 kΩ or higher (open) and 500 Ω or lower (short)
2.5 V: 3.5 kΩ or higher (open) and 1.5 kΩ or lower (short)
4.0 V: 25 kΩ or higher (open) and 8 kΩ or lower (short)
Response speed:
9320-01: 500ns or lower
9327: Detectable pulse width 100ns or higher
Max. allowable input: 0 to +50V DC
(the maximum voltage that can be applied across input pins
without damage)

n MR9321-01

Detection of AC or DC relay drive signal for High/Low
state recording. Can also be used for power line interruption
detection
Input: 4 channels (isolated between unit and channels),
HIGH/LOW range switching
Input resistance: 100 kΩ or higher
(HIGH range), 30 kΩ or higher (LOW range)
Output (H) detection:
170 to 250 V AC, ±DC 70 to 250 V (HIGH range)
60 to 150 V AC, ±DC 20 to 150 V (LOW range)
Output (L) detection:
0 to 30 V AC, ±DC 0 to 43 V (HIGH range)
0 to 10 V AC, ±DC 0 to 15 V (LOW range)Response time:
Rising edge 1 ms max., falling edge 3 ms max.
(with HIGH range at 200 V DC, LOW range at 100 V DC)
Max. allowable input: 250 Vrms (HIGH range), 150 Vrms
(LOW range) (the maximum voltage that can be applied
across input pins without damage)
Up to three units can be installed in a single
instrument (or 1 block)

( ) with input isolated from the unit, the maximum voltage that can be applied between input channel and chassis and between input channels without damage

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Analyze data on a computer
LAN terminal

USB receptacle A
(For USB memory device)

Easy recording of measurement data
Compatible to USB memory sticks
Measurement data can be saved on any generic USB memory device.
Measurement data can be easily recorded, and a USB
flash drive can be used to easily copy data to a computer.

Block II

Block I

LAN communications capability
HTTP/FTP server function
A 100BASE-TX LAN port is built in as standard equipment.
<HTTP server capability>
Access the unit via a web browser running on a computer,
for waveform observation and remote operation. Waveform
data of the MR8740/MR8741 series can also be downloaded
and pasted onto Excel.
<FTP server capability>
Copy the memory contents of the MR8740/
MR8741 (USB memory, internal RAM) to a
computer.

Analyzing data on a computer
l WAVE PROCESSOR 9335 (option)
• Waveform display and calculation
• Print function

l LAN COMMUNICATOR 9333 (option)

• Collect waveform data
• Remotely control Memory HiCorders with a PC
• Save data in CSV format and export to spreadsheet applications

l iPad App for Memory HiCorder HMR Terminal


(option)

Free app (exclusively for iPad) downloadable from the App Store

• Freely control waveforms using iPad’s gesture controls
• Multi-channel support – up to 32 channels (with MR8827,
MR8740) of waveform data at your fingertips
• Operate the Memory HiCorder via network
You can change settings, and monitor waveforms during
measurement.
*New function on Ver 2.0

HUB

■ 9335 Outline specifications (option)
Operating environment Windows 8/7 (32/64-bit), Vista (32-bit), XP, 2000
• Display: Waveform display, X-Y display, cursor function, etc.
• File loading: Readable data formats (.MEM, .REC, .RMS, .POW)
Largest readable file: Largest file that can be saved by supported
instruments (Supported file size may be limited due to computer’s
Functions
operating environment.)
• Data conversion: Conversion to CSV format, batch conversion of multiple files
• Print function: Saving of print image files (with support for enhanced
metafile [EMF] format)
Print
• Print format: Select from no tiling, 2 to 16 tiles, 2 to 16 rows, X/Y 1 to
4 tiles, preview/hard copy
■ 9333 Outline specifications (option)
MR8740 (ver 3.12 or later), MR8741 (ver 2.12 or later), or other
Supported units
Operating environment Windows 8/7 (32/64-bit), Vista (32-bit), XP, (The 9333 ver.1.09 or later)

Functions

l Wave Viewer (Wv) Software (bundled software)
• Confirmation of binary data waveforms on a
computer
• Saving data in the CSV format for transfer to
spreadsheet software

■ Wave Viewer (Wv) Outline specifications (bundled software)
Operating environment Windows 8/7 (32/64-bit), Vista (32-bit), XP, 2000
Functions

• Simple display of waveform file
• Convert binary data file to text format, CSV
• Scroll display, enlarge/reduce, jump to cursor/trigger position, etc.

• Auto-saves waveform data to PC, Remote control of Memory
HiCorder (by sending key codes and receiving images on screen), print
reports, print images from the screen, receive waveform data in same
format as waveform files from the Memory HiCorder (binary only)
• Waveform data acquisition: Accept auto-saves from the Memory
HiCorder, same format as auto-save files of Memory HiCorder (binary only), print automatically with a Memory HiCorder from a PC. The
Memory HiCorder’s print key launches printouts on the PC
• Waveform viewer: Simple display of waveform files, conversion to
CSV format, or other

■ HMR Terminal Outline specifications (free software)
Supported units

MR8740, MR8741, MR8847-01/-02/-03, MR8827

* calculated waveforms and logical waveforms not supported

Operating environment iOS on the iPad (Apple Inc. )

Functions

• Data acquisition: Send to iPad via FTP using a WiFi router, or load to
iPad via iTunes (PC app)
• Intuitively operate waveform level searches, maximum / minimum /
average values, zero position adjustment, and more at your fingertips
• Waveform monitoring
• Meter setting
* Logic waveforms and computational waveforms are not supported.

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Convenient functions
Connect a display and mouse to enable standalone use.

Display and mouse connectivity
Measure without using a PC.
By connecting a display and mouse to the MR8740/
MR8741, you can display waveforms and operate the
instrument with a mouse.
The monitor display screen uses the same layout as the MR8847
Memory HiCorder series display. A mouse can be used to operate and
configure the instrument, providing a user experience that approximates
use of a keyboard. (Display and mouse not included.)

X-Y wave comparator

MR8741 only

Value monitor (DMM display)

DMM display (example: measurement using the MR8990)

Waveforms obtained through X-Y compositing are subject to area judgment.

The MR8741 includes functionality for judging X-Y waveforms.
Waveforms measured using the memory function and created
with X-Y compositing are subject to area judgment.
The X-Y waveforms captured from these and many other applications
can be tested against reference waveforms automatically:
• Alteration and pressure at press machines
• Pump pressure and flow

Input values can be monitored numerically in the manner of a
digital multimeter (DMM).

Numerical calculation function
Calculate parameter values from measured waveform
20 different built-in calculation types including effective (rms)
value, peak value, and maximum value.
Multiple channels can be measured and judged at once,
minimizing cycle times. Inter-channel calculations can also be
performed at high speed by means of internal processing, and the
results can be transferred to a computer.

Evaluation
settings

Numerical calculation settings

Evaluation settings
Number of data
High
level

Low
level

Phase difference =
Time difference T between wave A and wave B
Cycle of wave A

Numerical calculation results can be shown on waveform display

×360°

Histogram